- 1(current)
Q. No.Consider a population of 10 million cells. Given the per-capita birth rate of 0.002 (per unit time) and the per-capita death rate of 0.002 (per unit time), the expected number of cells after 10 generations is ___________.
1. 100 million
2. 1 million
3. 5 million
4. 10 million
1. 100 million
2. 1 million
3. 5 million
4. 10 million
Subtopic: Â Population Characters: Density |Â Population Characters: Natality & Mortality |
 93%
Level 1: 80%+
NEET - 2026
Please attempt this question first.
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Please attempt this question first.
When will the population density increase, under special conditions?
When the number of:
When the number of:
| 1. | deaths exceeds number of births and also number of emigrants equals number of immigrants |
| 2. | births plus number of immigrants equal number of deaths plus number of emigrants |
| 3. | birth plus number of emigrants is more than the number of deaths plus number of immigrants |
| 4. | birth plus number of immigrants is more than the sum of number of deaths and number of emigrants |
Subtopic: Â Population Characters: Density |Â Population Characters: Natality & Mortality |Â Population Characters: Age Structure & Migration |
 84%
Level 1: 80%+
NEET - 2024
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The impact of immigration on population density is:
| 1. | Negative |
| 2. | Both positive and negative |
| 3. | Neutralized by natality |
| 4. | Positive |
Subtopic: Â Population Characters: Density |Â Population Characters: Natality & Mortality |
 85%
Level 1: 80%+
NEET - 2020
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A biologist studied the population of rats in a barn. He found that the average natality was 250, average mortality 240, immigration 20 and emigration 30. The net increase in population is:
| 1. | 15 | 2. | 05 |
| 3. | zero | 4. | 10 |
Subtopic: Â Population Characters: Density |
 92%
Level 1: 80%+
AIPMT - 2013
Hints
A country with a high rate of population growth took measures to reduce it. The figure below shows age-sex pyramids of populations. A and B are twenty years apart. Select the correct interpretation about them:
Interpretations
| 1. | 'A' is more recent and shows a slight reduction in the growth rate |
| 2. | 'B' is an earlier pyramid and shows stabilised growth rate |
| 3. | 'B' is more recent showing that the population is very young |
| 4. | 'A' is the earlier pyramid and no change has occurred in the growth rate |
Subtopic: Â Population Characters: Density |Â Population Characters: Age Structure & Migration |
Level 3: 35%-60%
AIPMT - 2009
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- 1(current)
Q. No.
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